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An experimental device for simulating ventilation resistance in narrow and long spaces with complex structures

A technology for simulating experimental devices and ventilation resistance, which is applied in aerodynamic tests, measuring devices, and testing of machine/structural components, etc. It can solve the difficulties of comprehensive observation, full-scale experiments, full-scale experiments and scale-down experiments and other problems, to achieve the effect of simple structure, flexible and convenient disassembly and assembly

Active Publication Date: 2021-06-25
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] According to the defects such as the complex interior of the comprehensive pipe gallery, the difficulty of comprehensive observation, and the difficulty of conducting full-scale experiments under multiple working conditions, the present invention provides a convenient and flexible ventilation model device for the comprehensive pipe gallery, which solves the problem of full-scale experiments in the early stage of the comprehensive pipe gallery development. And the difficulty of scale-down experiments, it fills in the gaps in the previous research on the local resistance at the branch section of the comprehensive pipe gallery, and makes up for the blank points in the experimental model of the pipe gallery

Method used

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  • An experimental device for simulating ventilation resistance in narrow and long spaces with complex structures
  • An experimental device for simulating ventilation resistance in narrow and long spaces with complex structures
  • An experimental device for simulating ventilation resistance in narrow and long spaces with complex structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 - Ventilation resistance experiment of pipe gallery under different ventilation modes

[0039] According to the typical section of the pipe gallery, with a similar ratio (1:10), three sections of the main section (5) are selected to combine to build the pipe section of the experimental platform for simulating the prototype (such as figure 2 As shown), a variable frequency fan (1) is installed at both ends, and the equivalent model of the cable rack (11) is arranged and combined along the pipe wall according to the actual experimental needs. Arrange the holes (10) along the measuring points of the main corridor (5) to lay out the wind speed and pressure measuring device (15), connect the data monitoring system (16) and the control system (17), and then test run.

[0040] Check whether the connection of each part is normal, check whether each part is in good condition, start the trial operation of the fan (1) through the control system (17), start the data dete...

Embodiment 2

[0046] Example 2 - Simulation of ventilation resistance under different structures of the comprehensive utility gallery

[0047] According to the typical section of the first type of pipe gallery, with a similar ratio (1:10), select three sections of the main section (5) to combine to build the pipe section of the experimental platform for simulating the prototype, and set a frequency conversion fan (1) at each end, According to actual experiment needs, the equivalent model of the retractable cable rack (11) is arranged and combined along the pipe wall, and the equivalent model of the retractable cable rack (11) can be adsorbed on the side wall of the main pipe gallery section (5) through the magnetic attraction (12). Arrange the holes (10) along the pipe gallery measuring points to arrange the wind speed and pressure measuring device (15), and connect the monitoring system (16) system and the control system (17). Then test run.

[0048] Check whether the connection of each p...

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Abstract

The invention relates to a ventilation experiment device for a narrow and long space with a multifunctional complex structure, which provides a solution to the technical difficulty that the ventilation resistance of the narrow and long space with a complex structure is difficult to measure. By setting multiple simple-structure main pipe gallery sections and branch pipe gallery sections, simulate and assemble them into comprehensive pipe gallery modules with different structures; by setting different numbers of frequency conversion fans, change the installation position of frequency conversion fans on the main corridor, and open and close fans , to simulate different ventilation conditions; by changing the position of the fire door and adjusting the rotation angle of the grille to simulate the resistance of different sizes of fire doors; The ventilation friction of the corridor structure fills in the gaps in the previous research.

Description

Technical field: [0001] The invention relates to a device for simulating an internal ventilation resistance simulation experiment in a narrow and long space with a complex structure, in particular to the equivalence of local resistance of a section structure of a complex structure in a long and narrow space, the ventilation resistance effect generated by the internal device, and the like. Background technique: [0002] With the rapid development of urban underground space, there are more and more long and narrow spaces with complex underground structures, such as various urban traffic tunnels with multiple entrances and exits, and urban comprehensive utility corridors with various pipelines inside. For such long and complex underground spaces, ventilation measures are the key factors to ensure the quality of the internal air environment and fire rescue. However, the formula for calculating the ventilation resistance of conventional long and narrow passages is difficult to app...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M9/00G01M9/06G01M9/08
CPCG01M9/00G01M9/06G01M9/08
Inventor 李炎锋王致远赵守冲徐晨亮白振鹏李俊梅
Owner BEIJING UNIV OF TECH
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